Notable events involving Moosejaw include:

10 Sep 1941German U-boat U-501 was sunk at 2330hrs on 10 September 1941 in the Denmark Strait south of Angmagsalik, Greenland, in position 62°50'N, 37°50'W, by depth charges and ramming from the Canadian corvettes HMCS Chambly (A/Cdr. J.D. Prentice, RCN) and
HMCS Moosejaw (Lt. F.E. Grubb, RCN).

11 Sep 1941HMCS Kenogami (Lt.Cdr. R. Jackson, RCNVR) and HMCS Moosejaw (T/Lt. L.D. Quick, RCN) together pick up 41 survivors from the British merchant Berury that was torpedoed and sunk by German U-boat U-207 east of Cape Farewell in position 62°40'N, 38°50'W.

19 Feb 1942HMCS Moosejaw (T/Lt. L.D. Quick, RCNR) was grounded again (see January 9th) at south entrance to St. John's harbour. She was undergoing temporary repairs at St. John's until 5 March when she left for Saint John, New Brunswick for permanent repairs that lasted until 25 June.

28 Feb 1945HMCS Moosejaw (T/Lt. A. Harvey, RCNR) picks up 6 survivors from the British merchant Norfolk Coast that was torpedoed and sunk by German U-boat U-1302 south-west of Strumble Head in position 51°58'N, 05°25'W.